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FAN54010UCX

Description
USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
File Size1MB,36 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
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FAN54010UCX Overview

USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator

FAN5401X Family — USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
July 2012
FAN54010 / FAN54011 / FAN54012 / FAN54013 / FAN54014
USB-Compliant Single-Cell Li-Ion Switching Charger with
USB-OTG Boost Regulator
Features
Fully Integrated, High-Efficiency Charger for Single-Cell
Li-Ion and Li-Polymer Battery Packs
Faster Charging than Linear
Charge Voltage Accuracy:
0.5%
at 25°C
1%
from 0 to 125°C
Description
The FAN54010 family (FAN5401X) combines a highly
integrated switch-mode charger, to minimize single-cell Lithium-
ion (Li-ion) charging time from a USB power source, and a
boost regulator to power a USB peripheral from the battery.
The charging parameters and operating modes are
2
programmable through an I C Interface that operates up to
3.4 Mbps. The charger and boost regulator circuits switch at
3MHz to minimize the size of external passive components.
The FAN5401X provides battery charging in three phases:
conditioning, constant current, and constant voltage.
To ensure USB compliance and minimize charging time, the
2
input current is limited to the value set through the I C host.
Charge termination is determined by a programmable
minimum current level. A safety timer with reset control
provides a safety backup for the I
2
C host.
The integrated circuit (IC) automatically restarts the charge
cycle when the battery falls below an internal threshold. If the
input source is removed, the IC enters a high-impedance
mode with leakage from the battery to the input prevented.
Charge status is reported back to the host through the I
2
C
port. Charge current is reduced when the die temperature
reaches 120°C.
The FAN5401X can operate as a boost regulator on
command from the system. The boost regulator includes a
soft-start that limits inrush current from the battery.
The FAN5401X is available in a 1.96 x 1.87 mm, 20-bump,
0.4 mm pitch, WLCSP package.
5%
Input Current Regulation Accuracy
5%
Charge Current Regulation Accuracy
20 V Absolute Maximum Input Voltage
6 V Maximum Input Operating Voltage
1.45 A Maximum Charge Rate
Programmable through High-Speed I
2
C Interface
(3.4 Mb/s) with Fast Mode Plus Compatibility
Input Current
Fast-Charge / Termination Current
Charger Voltage
Termination Enable
3 MHz Synchronous Buck PWM Controller with Wide
Duty Cycle Range
Small Footprint 1H External Inductor
Safety Timer with Reset Control
1.8 V Regulated Output from VBUS for Auxiliary Circuits
Weak Input Sources Accommodated by Reducing
Charging Current to Maintain Minimum VBUS Voltage
Low Reverse Leakage to Prevent Battery Drain to VBUS
5 V, 500 mA Boost Mode for USB OTG for 3.0 V to
4.5 V Battery Input
Applications
Cell Phones, Smart Phones, PDAs
Tablet, Portable Media Players
Gaming Device, Digital Cameras
Figure 1. Typical Application
All trademarks are the property of their respective owners.
© 2011 Fairchild Semiconductor Corporation
FAN5401X Family • Rev. 1.0.4
www.fairchildsemi.com

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Description USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator FAN54010 / FAN54011 / FAN54012 / FAN54013 / FAN54014 USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator
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